Chill roll



y 5, 1932- A. w. DE VOUT ET AL 1,356,509

CHILL ROLL Filed Feb. 16, 1931 Mwnvm My WW? INVENTOR #4 CM ATTORNEY user AVMLABLE CORY Patented July 5, 1932 UNETED STATES arisen w. nu vou'r am; RICHARD w. are nus sreuoas, BY mnsnn assrennnnrs, ro r x r gu srarer. ira rn; 1g

cnroaeo, rumors, a GORPORATIGN or nntawaua CHILL sate Application filed February 16, 19 3 1 Our invention relates to temperature control of direct expansion refrigerated chill rolls. One of the objects of our invention is to permit more exact control than has heretofore been possible with known chill rolls.

Other objects of our invention will be apparent from the description which follows.

Referring now to the drawing which is a perspective'view of a hollow chill roll broken away to show the float control valve. Chill roll 1 is rigidly aiiixed to shafts 2 and 3 which are journalled respectively in bearings 4 and 5 to permit of axial rotation. in the specific embodiment of our invention shown, a liquid refrigerant such as ammonia enters through line 6 passing through liquid pressure reducing valve 7 and entering the roll through line 8, which passes into the roll through an opening provided in shaft or trunnion 2, appropriate means to efi'ect a seal being provided. The ammonia gains entry into the interior of the roll through liquid float control valve 9 which is automatically controlled by float 10, maintaining the level of liquid 11. The gas passes out through pipe 12, which passes out of the roll through shaft or trunnion 3, appropriate means being provided to effect a seal. The

ty measure.

line 12 leads the gas to the pressure regulating valve 13 into pipe 14 which carries the gas to the ammonia compressor. Where used, liquid pressure reducing valve 7 and pressure regulating valve 13 may be either spring loaded or weight loaded such that the can be set for a definite pressure.

e have found in practice that liquid pressure reducing valve 7 is not necessary inasmuch as float valve 9 if properly constructed adequately controls the intake of liquid ammonia. We have shown liquid pressure reducing valve 7 to be used merely as a safe- It will be noted that the chill roll revolves, agitating the liquid to some extent. The mtake and outlet lines of the valves are fixed. Consequently, it is not possible to get absolutely exact pre-determmed levels of liquid within the roll. The approximation obtained, however is exact enough for satisfactory commercia operation and a considerable advance over any, means for by appropriate means such as a knife bar regulating the level of ammonia in the chill roll which has come to my attention. The roll which we have. shown and described is particularly adapted for use in chilling eggs which have been removed from the shell, but it is to be understood that it may be used either with or without modificationsfor any purpose for which a direct expansion roll may be indicated. The iloat valve we have shown is merely by way of illustration and not byway of limitation. Other valves may be used such, for example, as the type of valve in which the float only is placed within the roll, being regulated by a rod running to the valve outside the roll. In operation, of course, the product to be chilled is fed upon the outer surface of the roll in a filmof any desired thickness being taken oif, before completing the revolution, m or shaver. Inasmuch as our invention relates specifically to temperature control of direct expansion, refrigerated chill rolls without regard to product feeding means or product takeoff means, we have not shown feeding or takeofi" means in the drawing.

Although we have mentioned only am-' monia, it is to be understood that our invention may be utilized'with any liquid refrigerant which is in a gaseous state at atmospheric pressures.

We claim: 1. A direct expansion refrigerated chill roll, meansfor rotatably supporting the chill roll, an intake pipe for a liquified gaseous refrigerant leadin into said roll through a trunnion at one enfof the latter andterminating within the roll adjacent the end through which it enters, a float control valve within the chill roll to control he flow thrgugh said intake pipe, and an ou let pipe lea irig out of the opposite end ofthe chill roll through a trunnion at said end of the roll, spaced from and unconnected with said intake pipe, for withdrawing gas from J chill roll.

2. A direct expansion refrigerated chill roll, means for rotatably supporting the chill roll, an intake pipe for a liquified gaseous refrigerant leading into said roll through a trunnion at one end of the latter and terminating within the roll adjacent the end through which it enters, a float control valve within the chill roll to control the flow 6 through said intake pipe, an outlet pipe leading out of the opposite end of the chill roll through a trunnion at said end of the roll, spaced from and unconnected with said intake pipe, for withdrawing gas from the 10 chill roll, and gas regulating valves on said intake and outlet pipes.

Signed at Chicago, Illinois, this 11th day of February, 1931.

ANSON W. DE VOUT. 15 RICHARD W. REGENSBURGER. 

